Why is the Sat Nav so bad?

Just come back from a 1500 mile road trip to France.
Key failings
1) not being able to choose preference on charging speed - at one point we were aiming for a 150 Kw charger to be redirected to a 22 kw with a 1h57m stop!
2) not being able to choose a preference of charging network - currently with the discounted Ionity fares I'd prefer to stop at these if possible rather than a Porsche dealership at 3 times the price!
3) not being able to select planning based on preferring motorway service stops rather than trekking for 30 mins to the centre of local town to be sitting on an Audi forecourt!
4) it would be useful to have a clue on the parameters used in the calculation and have some influence over them.
5) some might say why not use another app e.g. ABRP but this is too estimated and doesn't include the car and battery data.

I resorted to planning the stops needed ( in a range) and adding these and interim destinations but despite picking the specific chargers on the MBUX the routing doesn't recognise them as chargers and suggests charging for a period before then going to the interim destination at the same location!!!!

Come on Mercedes for a £70k+ vehicle the system is very very poor. When will there be updates and when can they be loaded to the car????